package com.itheima.servlet;

import com.itheima.bean.Student;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.beans.IntrospectionException;
import java.beans.PropertyDescriptor;
import java.io.IOException;
import java.lang.reflect.Method;
import java.util.Map;

@WebServlet("/servletDemo05")
public class ServletDemo05 extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        //获取所有的数据
        Map<String, String[]> map = req.getParameterMap();

//封装学生对象
        Student stu = new Student();
        //遍历集合
        for (String key : map.keySet()) {
            String[] value = map.get(key);
            //获取student对象的属性描述器
            try {
                PropertyDescriptor pd = new PropertyDescriptor(key, stu.getClass());
                //获取对应的setXxx方法
                Method writeMethod = pd.getWriteMethod();
                //执行方法
                if (value.length > 1) {
                    writeMethod.invoke(stu, (Object) value);
                } else {
                    writeMethod.invoke(stu, value);
                }

            } catch (Exception e) {
                e.printStackTrace();
            }
            System.out.println(stu);
        }

    }

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        doGet(req, resp);
    }
}
